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2
votes
1answer
34 views

Is it possible to share blockchain data between multiple nodes?

I'm planning to create a Raspberry Pi Cluster in order to run several bitcoin nodes. Can I share parts of the ~/.bitcoin/ folder in order to not have to store the entire hundreds of GB for each of the ...
1
vote
0answers
24 views

Why not connect to all (huge amount of) nodes?

If you mine, a good network propagation time is important in case of mining-forks. I read that bitcoin only connects to 8 nodes. I would connect to many nodes as I can support to minimize my block ...
1
vote
1answer
25 views

CryptoGraffiti.info litecoin alternative

I have some pictures and litecoins, and I would like to be able to upload images to the litecoin blockchain. I also have some bitcoin, but, because of the higher value of bitcoin, I think I would ...
0
votes
0answers
26 views

How should I calculate a net value after a BTC withdrawal from an exchange?

Many exchanges have a withdrawal fee (such as Poloniex, which charges customers in 0.0005 BTC on average) and these fees are mostly for network costs. Should I consider as a general rule that the ...
2
votes
2answers
68 views

Is it possible to watch the chain to count the number of Lightning channels? [duplicate]

I know it's possible to get number of public Lightning channels from Lightning Network gossip and some implementations offer network graph and it can be queried. But it's not possible to see private ...
0
votes
1answer
27 views

Wallet forensic

Someone who scammed me used this wallet to receive the BTC 12fmomENb5SSxR54Bitua71CZrc4oVQtmB he hasn't moved them from there since July 31st I'm trying to figure it if that wallet belong to any ...
0
votes
1answer
35 views

How to move only “blocks” and “chainstate” folders on an external USB hard-drive while running Bitcoin Client on connected laptop with Ubuntu?

I have experience with secure-copy and secure-download but how do I move only the Bitcoin Client "blocks" and "chainstate" folders within the home directory of Ubuntu 18.04 to an external USB hard-...
0
votes
1answer
16 views

Why do I get: Error: <address> has no matching Script

The example code for psbt.addOutput() with address '1KRMKfeZcmosxALVYESdPNez1AP1mEtywp' works as expected. But if I change this to an testnet address I get this error: ' has no matching script'. I ...
1
vote
0answers
25 views

Extinct block in index

I am working on a blockchain parser. I first parse the header index to know where the data is located in the .blk files. And then I parse the blk files in the right order. (I use the data from my full ...
1
vote
1answer
60 views

How to decode a coinbase transaction?

Below is block result of block height 200,000 { 'hash':'000000000000034a7dedef4a161fa058a2d67a173a90155f3a2fe6fc132e0ebf', 'confirmations':396774, 'strippedsize':247533, 'size':247533, ...
1
vote
1answer
21 views

Why is getdescriptorinfo returning an error “Invalid descriptor (code -5)”

I am using Bitcoin Core bitcoin-cli with getdescriptorinfo like so: curl --data-binary '{"jsonrpc": "1.0", "id":"curltest", "method": "getdescriptorinfo", "params":["sh(multi(2,[3c60330a/1]...
0
votes
0answers
16 views

Bloom Filter Response Processing In terms of Full-node

A SPV node have to work somethings to see whether his transaction is exist or not. Construct his filter with hash of transactions {his transactions, other1, other2, ..., otherN} filterload is filled ...
0
votes
1answer
32 views

Why does Bitcoin RPC load wallet too slowly?

I'm trying to load old wallet (which I have not been opening for months) and it takes too much time (~minutes). In this time seems like I can't do any further requests to RPC. After this new calls to ...
1
vote
1answer
29 views

Electrum address syncronization

I need to periodically check the balance of a number of bitcoin addresses (a few tens or hundreds addresses). I noticed that Electrum may syncronize a thousand or more imported addresses in a matter ...
1
vote
0answers
21 views

Why do I get -4 error code from Bitcoin RPC

I'm directly dealing with Bitcoin RPC and my first step is loading wallet. At first I try to check listwallets to find the current wallet there. If not, trying to load wallet: Post body = {"method":"...
3
votes
2answers
232 views

Single tx included in two different blocks

https://www.blockchain.com/btc/tx/a7bacce00e5df85d3547a3f83ac10c65eec30f715c1d77d8d4a7bc17fd470965 How is it possible that a single tx is included in two different blocks? Isn't it considered double ...
0
votes
0answers
26 views

how to know miner of each bitcoin block [duplicate]

Do you know from what kind of API I can get miner info per each block? I've run bitcoin mainnet, and I want to know who mines each block if possbile. I've googled and read many docs but I couldn't ...
0
votes
2answers
49 views

Bitcoin purchased but not received into my wallet

I paid over 12k for bitcoins and it was sent and I have a copy of the bitcoin transaction. I have not received the amount into my wallet. Is there any way that I can still retrieve my bitcoins? It ...
1
vote
0answers
12 views

If I install libbitcoin-explorer will it be seperate from other libbitcoin repositories?

I am installing libbitcoin-explorer on a Raspberry Pi with the ./install.sh script and I wonder if this does anything to my existing installation of libbitcoin-system. Which files will be installed? ...
0
votes
0answers
13 views

request btc payment when insufficient btc sent

If a transaction was made and not enough btc to cover it, what are the options to add to the btc to cover the transaction. How does the request payment work in this instance?
1
vote
0answers
25 views

What is the formula for inferring hash rate from difficulty and block frequency?

Two parts to this question 1/ There have recently been concerns over drops in hash rate observed on sites such as blockchain.com. However, my understanding is that hash rate is inferred from the ...
0
votes
1answer
20 views

Bus error (core dumped)

Running a new install of Ubuntu 18.04.3 LTS and downloading blocks in bitcoin-qt up to over 70% when pgm quits with "Bus error (core dumped)". Anyone else get this or how to fix? (-rescan didn't help)...
0
votes
0answers
20 views

How do you sign up for the Bakkt exchange to trade Bitcoin Futures?

With the recent launch of the Bakkt exchange. How do you sign up for this exchange or is this exclusively for institutions and not for individuals? There is no sign up option anywhere on their site.
1
vote
2answers
109 views

I just compiled bitcoind and run for the first time. Do I already have a private key?

Since I have a wallet.dat I suspect I already have a private key and so I could extract it for backup purpose (on paper). How do I do it via terminal with bitcoin-cli?
0
votes
0answers
23 views

What is the algorithm used to calculate profitability for Bitmain mining SHA-256 [duplicate]

I want to know how I can calculate the profit of bitcoin mining using SHA-256 Algorithm. I am interested in the formula that is used by calculators. For example lets say I have 700mh/s hashrate, ...
1
vote
1answer
32 views

Consequences of sibling keys when xpub and xprv are leaked

Let's say the following keys are leaked: 44'/60'/4'/0 extended private key 44'/60'/4'/0 extended public key (you can just derive this from the above private key) Now using the above information can ...
6
votes
2answers
473 views

Most efficient way to store Segwit Address in a database

This is not a duplicate of What is the most efficient way to store bitcoin addresses in a database? but it's the same question except I need a segwit answer. Let's say I wanted to store every ...
1
vote
3answers
43 views

How is the monetary part of bitcoin stored?

How is the monetary aspect of a bitcoin stored? I understand that the blockchain is a set of records documenting transactions. I've also seen that blockchains in general can store arbitrary ...
4
votes
0answers
58 views

Does BIP70 have any problem (security/privacy/etc)? Why will Bitcoin Core disable it by default in the next major release (0.19.0)?

Recently it's reported that Bitcoin Core will disable BIP70 support by default in the next major release (0.19.0): https://cointelegraph.com/news/sorry-bitpay-new-bitcoin-upgrade-proposal-disables-...
-1
votes
0answers
16 views

can login into my blockchain wallet if I have lost my email password [on hold]

I can't remember my email password for verification, but I have my backup phrase password and wallet id
0
votes
0answers
16 views

How work settxfee on 0.13.0? [duplicate]

I do bitcoin-cli settxfee 0.00088496 true or $fee = '0.00088496'; if ($bitcoin->settxfee($fee)) { and then $redeem = $b->sendtoaddress($address, 0.0001); And I expect payment in bytes will ...
0
votes
2answers
25 views

Pending transactions 0/3 [duplicate]

I sent bitcoin from my blockchain to my paxful and it says pending in my paxful history 0/3 confirm. Please what happened. And the bitcoin has left my blockchain wallet and it only showing unconfirmed ...
2
votes
1answer
32 views

What are the consequences from the leak of xpub and child private key?

Let's say the following keys are leaked: Extended public key derived from path 44'/60'/4' Leaked child private key from path 44'/60'/4'/0 Does that imply all the child private keys of the root 44'/...
0
votes
0answers
16 views

What happened to Smartbit explorer?

I was using API located at http://smartbit.com.au to communicate with bitcoin testnet. Now API is not available anymore. Generally, whole service is gone. Some time ago (idk, like few weeks ago) chain....
0
votes
1answer
30 views

Standalone Java Bitcoin Miner - Does it Exist?

I am a java developer, and currently am looking to create a standalone java class that will let people mine Bitcoin using CPU, but I have no idea if such already exists. I have found one for LiteCoin, ...
0
votes
0answers
12 views

Why can't a user import keys to the keypool for a blank wallet?

I am creating a blank wallet with the intention of adding keys to the keypool but get an error keys can only be imported to the keypool when private keys are disabled Why? It would be beneficial for ...
0
votes
2answers
38 views

How Bitcoin dose find and verify UTXO ? is this efficient?

If Bitcoin sees all blocks, it will be very slow based on chain length and block size but, it can certainly verify incoming transactions. I know that blockchain is never modified any previous block. ...
0
votes
0answers
19 views

bitcoin-cli getbalance does not match balance with bitcoin-cli listtransactions

version of bitcoin-cli 0.17.1 when I try bitcoin-cli getbalance I get balance 0.00010471 BTC when I try bitcoin-cli listtransactions "*" 1000000 >aaa.txt and then calculate SUM(receive) -...
0
votes
2answers
47 views

How the blockchain knows that its been tampered with?

I know that the transactions stay in the block and hashed alongside few other things and that hash is stored in the next block. And I understand that if you try to tamper with one of the transactions, ...
0
votes
0answers
14 views

Extract BCH from BTC wallet [duplicate]

I have the BTC address that I put the BCH in. How can I get it back out? My first transaction was rushed and I made the mistake. I tried moving it, the address show the BCH and no BTC. Very new at ...
0
votes
0answers
34 views

zmq pubhashblock / pubrawblock during initial block sync

I've recently noticed that block data is not published via zmq during the initial sync (but transaction data is). Is that something to be expected, or could it be a misconfiguration of my node (or ...
0
votes
2answers
43 views

Can't get the tx with gettransaction or getrawtransaction methods

I am running bitcoin-d (probably downloading the prev blocks) in a shell. In another shell i am trying to get the information of a transaction (...
0
votes
1answer
25 views

How to calculate the Public key P2SH from hexadecimal script?

My study on the scripts goes next. I'm creating a ScriptPubKey decompiler, now I have a problem with the P2SH, So how is calculate the key p2sh? I using this code but I not think is correct ...
4
votes
1answer
155 views

How fast can a LN payment be over TOR?

I wonder how fast a LN payment can be over TOR if all possible optimizations have been implemented?
0
votes
1answer
53 views

How can I move BTC wallet and funds from Block.io?

Unfortunately I can't access dashboard on block.io for some unknown reason. I get the following message from block.io We're sorry, but something went wrong. If you are the application owner check ...
0
votes
1answer
29 views

What is the program in Python that print information about the current block?

What is the program in Python that print information about the current block the world try to mine (I mean Version, Previous Block, Merkle Root, Time, Bits) plus how many zeros we are looking for for ...
0
votes
2answers
37 views

Problem to link to libsecp256k1 on ARM architecture

Trying to compile with g++ -o addr 69_addr2.cpp $(pkg-config --cflags --libs libbitcoin) is getting me this error: /usr/bin/ld: /home/pi/libbitcoininstall/lib/libsecp256k1.a(libsecp256k1_la-secp256k1....
0
votes
1answer
23 views

How the difficulty of the network affect the average block mining time if we have static hash power?

Let's suppose that I have 500 KH/s of hash power overall from my mining rig. I'm about to start mining coin X and its network difficulty is Y. Current hashrate of the whole network is 100 KH/s and ...
-1
votes
0answers
12 views

Short on bitmex when bitcoin crashes

iIf i were to open a short position of 1btc on bitmex at $10k, and bitcoin would drop to $1. What would happen when i close my position at $1 bitcoin value? How much bitcoin would i get? I guess it ...
0
votes
0answers
29 views

How get the public key to hex script? like command decodescript of bitcoin core

If I want to recreate the command decodescript of bitcoin core? how is the process for decode the script P2PK? So I'm writing for personal exercise the Bitcoin script decompiler, form moment I have a ...

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